(By Joe Miller BBC News, Davos )
The Western world is "vulnerable" to epidemics such as Ebola, and must invest more in researching vaccines, a leading scientist has warned.
Prof Peter Piot told the BBC that developed nations would be in "deep trouble" if they failed to adequately prepare for another outbreak.
Speaking at the World Economic Forum, in Davos, he urged global leaders to take a "long-term view". READ MORE OF THIS STORY